in vitro

adverb or adjective

in vi·​tro in-ˈvē-(ˌ)trō How to pronounce in vitro (audio) -ˈvi- How to pronounce in vitro (audio)
-ˈwē-
: outside the living body and in an artificial environment

Examples of in vitro in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Carmani was born on May 31, 2006, and CeCe became pregnant through in vitro fertilization soon after. Nasha Smith, PEOPLE, 23 June 2026 The couple recently appeared to have their sights on welcoming more children into their family, with Bunnie previously opening up about their in vitro fertilization journey. Kimi Robinson, USA Today, 18 June 2026 Beyond organic growth, Canon plans to pursue strategic acquisitions in healthcare IT, in vitro diagnostics and therapeutic fields—extending its reach deeper into the medical ecosystem. Canon Inc. Contributor, Forbes.com, 29 May 2026 Advancements have also greatly extended the number of days human embryos can grow in vitro at the earliest stages of pregnancy. Alex Morris, Rolling Stone, 19 May 2026 See All Example Sentences for in vitro

Word History

Etymology

New Latin, literally, in glass

First Known Use

circa 1894, in the meaning defined above

Time Traveler
The first known use of in vitro was circa 1894

Cite this Entry

“In vitro.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in%20vitro. Accessed 28 Jun. 2026.

Kids Definition

in vitro

adverb or adjective
in vi·​tro in-ˈvē-(ˌ)trō How to pronounce in vitro (audio)
: outside the living body and in an artificial environment
an egg fertilized in vitro
Etymology

Latin, literally, "in glass"

Medical Definition

in vitro

adverb or adjective
: outside the living body and in an artificial environment
growth of cells in vitro
in vitro studies
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster